Dual Channel Gigabit Ethernet on MBP!?

Hi all,
I have a MBP with the ExpressCard/34 slot.
I am wondering, if I get an ExpressCard/34 to Gigabit Ethernet Card can I create a dual channel setup using the MBP's existing Gigabit port and the port on the Express/34?
If this was possible do I also need XSAN?
Cheers

Ned the point of the benchmark is (at least with the Core Duo) that the FSB limits memory access to 5.33 GB/s. Single Channel PC2 5300 667MHz RAM has a bandwidth of 5.33 GB/s. So what does doubling bandwidth via dual-channel to 10.66 GB/s do for you if the FSB is limiting it to 5.33 GB/s anyway. You can saturate the bus twice as fast? It is still saturated.
I am not speakng of saturating RAM, but rather saturating the FSB which is where the bottleneck occurs.
That is what the test is designed to show.
That is why I say that the benefits of 3GB outweigh the benefits of dual-channel. At least in terms of the Core Duo what are you really gaining from the dual-channel? In theory..nothing...in testing...nothing.
Nothing will slow down performance like paging out to a slow hard drive however.
edit
Not trying to be argumentative on this, I just have not seen any evidence of dual-channel having any signficant benefit to performance that would warrant being afraid to give it up for 3GB single-channel.
From Barefeats:
DO MATCHING PAIRS OF MEMORY HELP?
Though we ran the tests above using matching 1GB SODIMMs in both MacBook Pros (for a total of 2GB), we also ran the same tests in the 15" MacBook Pro Core 2 Duo with one 1GB SODIMM and one 2GB SODIMM for a total of 3GB of memory. We wanted to see if non-matched modules would cause the MacBook to slow down due to the loss of interleaving.
The answer is "no, it didn't slow down." In some cases we saw a gain in speed. An example is Aperture where the "lift and stamp" ran 11% faster with 3GB of RAM. But that's probably due to the fact that Aperture + OS X = more than 2GB of total memory usage.

Similar Messages

Dual 450mhz Gigabit Ethernet - Processor drops out.

Hi,
I have a G4 Gigabit Ethernet with dual 450mhz processors, and I am having a problem where one of my processors will drop out all together. This has happened sporadically over the past year and a half that I've owned the machine, but it has happened three times in the past month. This doesn't seem like a good sign to me. When the processor fails - according to the activity monitor it's always the same processor - the only way one can tell is by the slowdown of the machine; there are no app crashes, freezes or anything out of the ordinary. A simple shutdown and boot up is all that is needed to get the processor back online, and once that has happened the processor keeps going. I can continuously run this Mac for days without incident. Before this, months.
Has anybody else run into this problem?
Thanks in advance.
Malcolm

Thank you Japamac and Rodney,
When my friend, who is a Apple certified tech, comes around later this week to scope things out with my Mac, I'll have him check the heat sink and thermal compound.
When the processor dropped out the first two times, it did seem to coincide with an application crashing, the same app both times. However with the latest three episodes, there was no crash and that application was not running - The app I suspected I use almost on a daily basis and it has crashed a couple of times without coinciding with the processor dropping out - so I'm moving away from that theory. As I said previously, when the processor fails, the only way you know for sure is by the degradation of performance. I have also had one freeze up quite recently (maybe the third in a year in a half) but I don't know how you could determine if it was related to this problem, though. There was no information in hardware diagnostics.
Again thank you for your replies.

Using Xsan to carry data over dual gigabit ethernet connections?

A designer (mostly non-technical) colleague of mine has claimed that Xsan transfer data (not metadata) over dual gigabit ethernet, in lieu of Fiber Channel, with metadata flowing over a third ethernet. Is this true? Has anyone done an install in this manner? I can't find any reference of this, anywhere.
If anyone can help shed some light on this, I would appreciate it!
Thanks,
Ben

If you're planning on connecting to the SAN in this manner, be aware that the amount of bandwidth is MUCH smaller than fibre channel. (That's why X-SAN used fibre between clients and the SAN)
So... if you're thinking of pulling uncompressed HD through ethernet (even Dual Ethernet) you're going to be woefully disappointed.
Having said that, we regulary connect dozens of "story editors" to our X-SAN via a single gig E "reshared" connection. The secret is that we ONLY use "off-line RT" media for this connection. We've locked out our "Full Res" media from this kind of connection because it will only jam up the system and bring our internal system to it's knees. I would regard this kind of "tapping in" to the SAN as a "secondary" method, not your primary way of accessing the media.
Good luck.
mark

How big of a hardrive can i use in my gigabit ethernet g4 dual 500.

Hi there.
I wanted to now how big of a hard drive can i use in my gigabit ethernet g4 powerpc with a dual 500 processor . at the present time i have one 80 and one 20 gig drive in there now.
So my answer is how big of a drive can i use before i have problems with seting it up. Like i want to use a 500 gig drive in my computer and my old 80 gig too. i want to buy a apple tv and store my dvds on the big 500 hardrive so i have alot of room for the vidio files, for apple t.v . If i can use one as big as one terabite you now the real big one that would be fine. The more room i have the better for me. I will be able to watch the movies i downloaded from the internet and i wont have to burn them at all.
This is of corse if apple tv will handle it.

Hi-
If you need that much storage, and you'll have to buy a controller anyhow, get a SATA controller card, and put one or two 500gb SATA drives in. The enterprise class of SATA drives are made especially for multi media storage, have excellent seek times and fast data transfer rates. A "bargain" on a package can be had at OWC:
http://eshop.macsales.com/item/Other%20World%20Computing/SATAM500GPCI/
or
http://eshop.macsales.com/item/Other%20World%20Computing/SATAM10TBPCI/
The MaxLine Pro drives have great characteristics, and are reviewed favorably.
I have an OWC SATA card, and the card works perfectly, and is cheaper than other makers cards of equivalent specs.
G4AGP(450)Sawtooth, 2ghz PowerLogix, 2gbRAM, 300gbSATA+160gb HD, ATI Radeon 9800 Mac OS X (10.4.8) Pioneer DVR-109, LaCie 160gb, 23"Cinema Display, Ratoc USB2.0, Nikon Coolscan

ATI/Radeon 9800 Pro 128 AGP 4x/2x in Gigabit Ethernet dual 450 PMac G4

Hi,
This is my first time posting to these discussion group... I've been going through related threads and have not found an answer to my problem...
I have a Gigabit Ethernet dual 450 G4. Awhile ago I upgraded the processor to a Sonnet 1.8ghz so I could run Leopard.
I just bough the ATI/Radeon 9800 Pro 128 AGP 4x/2x video card. I researched around and that seemed to be a card that would work in my machine. I even read a review on Amazon where someone had also upgraded to the 1.8 processor used this card with no issues.
I do have an older monitor - Apple Studio Display CRT with the ADC connector. So I also bought the Apple DVI to ADC adapter kit.
I installed the card and do not get any picture at all - I believe I have installed everything correctly. I'm pretty sure I can hear the fan on the video card in the machine. The monitor is getting power from the adapter since the button lights up when I press it - but it does not stay lit -- the monitor never turns on. Using my old graphics card the monitor makes a little "beep" when it turns on.
In reading the other topics I am wondering if it might be a power issue? According to Other World Computing's profile my machine has a max of 220 watts. Although they suggest this video card as one the will work in my machine.
I have disabled the hard drive that came with the machine (too small) and am using two Maxtor hard drives that I added - one ATA (120gb) and one SATA (500gb) that is connected to an SATA pci card. I also have two additional pci cards with usb 2.0/firewire ports.
In looking at the topics here I came across the link about taping the 3 and 11 pins on the video card. Even though the card I have is 4x/2x not 8x I thought I'd give it a shot. That did not work either.
Any help you can give would be greatly appreciated.

I don't wish to sound redundant here, but I've been reviewing the vendor's page:
It's OK- I don't mind beating this dead horse....
The maker says such to protect themselves from possible claims that may arise due to over loaded systems and power problems when their card is installed in said system.
Of course, 300w would be nice, but they didn't even specify the PSU rating a couple years ago. The Sawtooth, with it's 237w PSU, used to be listed as a compatible machine for the 9800...... They just didn't consider how far a Sawtooth might be modded.
Within reason, the early G4's (Sawtooths) are capable of using the Radeon 9800 Pro. The GE has the same 338w PSU as the DA (they are interchangeable), so there is plenty of power for the 9800.
One thing to remember, the requirements of the ADC port of the AGP slot are removed by using a non ADC card. This really changes the calculations of the power available.
It's kinda' a long post, but, if you care to get ALL the details, check the following:
http://discussions.apple.com/thread.jspa?messageID=7065653&#7065653
I think you'll be satisfied with the explanation.......
Which leaves your second, and very appropriate, point.
The main enemy of all, though, isn't power. Heat is the biggest concern.
Reducing heat/increasing cooling by using a third party fan on the 9800 is highly recommended. The 9800 is a hot card, and the stock fan is prone to early failure.
Adding additional cooling to remove the extra heat produced by the 9800, by using an exausting PCI fan, will also help the PSU provide adequate voltage to the system, by reducing the amount of hot air moving out of the PSU.
Super heated air moving through the PSU reduces the cooling ability of the PSU. A hot PSU doesn't produce reliable power.
So, add the 9800, add some cooling, and enjoy!

Networking a G5 dual 2.5ghz and a Powerbook G4/550 (Gigabit Ethernet)

I have two macs. A PowerMac G5 dual 2.5ghz with 2 gigs ram. My other one is a Powerbook G4/550 (Gigabit Ethernet)(with PCMCIA Slot). I have the G5 at my desk and the Powerbook upstairs (about 100 feet by walking 40 feet as the crow flies. I have a 115 year old house with unGodly thick mortar walls that make any networking a challenge so I do not want to guess. I want the best networking solution afordability wise and efficiency wise. Mobility is not that big of a deal and speed of data transfer is paramount. I also do not want slow download or transfer speeds on either machine. I don't transfer mush from BIG MAC to small mac but the internet thing (SPEED) is important. I do movie and music editing on both and maintain a web site daily with tons of each on it. Should I wire the thing to avoid slow wireless speeds and what all do I need. I know my laptop (Original Airport) speed is 11mbs. but I can't seem to find any comparison to ethernet wired speeds. I have DSL and no airport card and don't mind wiring if the speed is lots better. Can someone straighten me out or point me to the andwers? Please? indigorob

If speed is important then you want to run ethernet cable between the computers. The Mac's ethernet (10/100/1000) connector is capable of 10 megabits/second, 100 megabits/second, and 1000 megabits/second (Gigabit Ethernet). The original airport is about 11 megabits/second. The Airport Extreme/Express is 54 megabits/second.
You can easily get at least 100 megabits/second by running wired Ethernet.

Gigabit Ethernet dual 400, 450, 500 - all same motherboard?

They all seem to have the same power supply - is everything the same except the processor? I've decided to buy one that matches my machine so if something else goes wrong (or it is a bad mother board) I can fix it. I'd just like to know if I have to stick strictly to the dual 450, which I have.
Thanks,
Brooke

In my experience—with tens of thousands of Macintosh computers—the module which most frequently fails in a Power Macintosh G4 (Gigabit Ethernet) model is the 661-2332 power supply. Far and away.
Unless you are extraordinarily hard on I/O connectors, both the logic board and any processor for this product family should outlast several power supplies, so purchasing one of those a spare part makes much more sense than purchasing either a logic board or a processor.

Usage or advantage of Dual Gigabit Ethernet

Just for my curiosity and knowledge, what is the advantage and usage of having a Dual Gigabit Ethernet behind the Mac Pro?
Any examples? or Articles I can read?
thank you

You can use the first one for Internet-bound and local traffic, the second for a local File Server.
IF you have a device that explicitly supports the required bonding protocol, you can bond the two links for even faster transfers.
The speed of even a single Gigabit Ethernet link exceeds almost every Internet connection, so the main benefit is in local file transfers (to other computers or servers).

Using both Dual Gigabit Ethernet Ports

Using both Dual Gigabit Ethernet Ports
If I plugged both of my ethernet ports into my LAN switch, that would double the bandwidth to and from my machine. A switch does not used shared bandwidth like a hub does. I realize that it won't speed up any of the other devices that are plugged into the switch. Regardless, I would have the capacity for double the bandwidth to my machine.
All LAN cables are CAT6 and the switch is 10/100/1000.
The question is, would Mac OS X 10.4.7 utilize both ports (soft of the way it uses multiple processors)?

It's easy to try... it's call "Link Aggregation"...
http://docs.info.apple.com/article.html?artnum=304120
You get to it by Network>Show>Network Port Configurations>New then Port in the popup, then you schould see Port Aggregation. Selt the two ports you wish to combine.

Upgrade GigaBit Ethernet Processor to Dual 1.0+

I have the Gigabit Ethernet Power Mac G4 and I want to upgrade the current processor to a Dual Processor above 1.0. The higher the better as well as the price is reasonable. I have seen some by Sonnet and others but I was asking what is the best I can get from a price and quality perspective. Thank you!

Hi-
Welcome to Discussions!
There aren't many dual processor upgrades currently available.
Of these upgrades, the 1.5ghz OWC single processor will outperform a dual 1.0ghz processor. There is a dual 1.8ghz Sonnet, but it will be out performed by the Newertech 7448 based 2.0ghz processor. For best price/performance, either the OWC or the Newertech would be the better choice.
For a dual processor, the FastMac dual 1.4ghz will be the strongest dual processor upgrade, better than the dual 1.8ghz Sonnet by virtue of the 2mb L3 cache.
The FastMac, OWC and the Newertech have three year warranties, as opposed to Sonnets one year.

Graphics card for G4 Gigabit Ethernet dual boot

I would like to use an Apple 20" LCD display with my Gigabit Ethernet G4 dual 500. It still has the original Rage 128 graphics card.
I have no problem with replacing the card for use under OSX, but this is a dual boot machine, also running 9.2.2, so any graphics card will have to support at least basic monitor functions in OS 9 also.
Since Apple has documented problems using Gigabit Ethernet models with the Radeon 9200, does anyone have any suggestions for a "miracle" card, that will do what I want?
Thanks!
G4 Gigabit Ethernet Mac OS X (10.4.7)

Hi
The Radeon 9000 Pro Mac Edition may be one possibility. It's an AGP card, has an ADC and DVI connector (and comes with a VGA adapter) and is supported by OS 9.2.1 and OS X 10.1.3 and later.
http://www.ati.com/products/radeon9000me/radeon9000prome/specs.html
Unfortunately it's no longer available retail but does seem to appear on eBay frequently. Two retail versions were available, one with 64MB VRAM, one with 128MB.

D20 Dual Gigabit Ethernet, benefits ??

Can anyone tell me please any benefits of having 2x Gigabit Ethernet, ports.
I can not see you can control what uses which port, if that would speed up any operations over another.
Perhaps I am missing the point.
Thank you for reading this
Solved!
Go to Solution.

normally i wouldn't just send someone straight to wikipedia but the answer to what virtualization is or does is way too much for me to sum up in a few sentences. the most basic principle is that it's a virtual installation of an OS installed in its own memory space. it saves from having to set up a physical installation and running a multiboot setup.
http://en.wikipedia.org/wiki/Virtual_machine
http://en.wikipedia.org/wiki/Hyper-V
http://en.wikipedia.org/wiki/VMware
networking directly into your ThinkStation is as simple as setting up shares and accessing them via an ethernet cable. you'd end up with a dedicated gigabit connection between two systems. search google for "networking two computers" and you'll find a host of guides. if you're using new enough hardware, a standard patch cable will work in lieu of a crossover cable. modern systems have autosensing ports and don't need crossovers. older systems, however, will.
ThinkStation C20
ThinkPad X1C · X220 · X60T · s30 · 600

Will on-board Gigabit Ethernet ports on a Cisco 3845 support a 100 Mb SFP?

Hi,
This is a very specific question - hopefully someone has tested this or run into this scenario...
I was trying to connect a Cisco 3845 router to a 100 Mbps circuit. Specifically, I was trying to connect this circuit to the on-board Gigabit Ethernet port (Gig 0/0). This is the port that can be used as either an RJ45 or SFP slot. The only SFP I had was a multi-mode 100 Mbps SFP. When I hooked it up to Gi0/0, I got a message saying the SFP type wasn't supported on the chassis.
I was able to deploy the 3845 and since then I haven't had the correct hardware to recreate the exact scenario. Has anyone experienced this? Is it simply because Gigabit interface on a 3845 won't support a Fast Ethernet (100 Mbps) SFP?
Thanks.

Not all SFP's will just plug in and work. Here are the SFP's that are considered compatible with the 3800 series ISR's.
GLC-LH-SM= Gigabit Ethernet SFP, LC connector, LX/LH transceiver
GLC-SX-MM= Gigabit Ethernet SFP, LC connector, SX transceiver
GLC-ZX-SM= 1000BASE-ZX SFP
CWDM-SFP-1470= Coarse wavelength-division multiplexing (CWDM) 1470-nm SFP Gigabit Ethernet and 1G/2G Fibre Channel (FC)
CWDM-SFP-1490= CWDM 1490-nm SFP Gigabit Ethernet and 1G/2G FC
CWDM-SFP-1510= CWDM 1510-nm SFP Gigabit Ethernet and 1G/2G FC
CWDM-SFP-1530= CWDM 1530-nm SFP Gigabit Ethernet and 1G/2G FC
CWDM-SFP-1550= CWDM 1550-nm SFP Gigabit Ethernet and 1G/2G FC
CWDM-SFP-1570= CWDM 1570-nm SFP Gigabit Ethernet and 1G/2G FC
CWDM-SFP-1590= CWDM 1590-nm SFP Gigabit Ethernet and 1G/2G FC
CWDM-SFP-1610= CWDM 1610-nm SFP Gigabit Ethernet and 1G/2G FC
http://www2.bt.com/static/i/media/pdf/cisco_3800_routers_faq.pdf

What's the maximum LAN speed with the Thunderbolt to Gigabit Ethernet Adapter on my MacBook Pro?

While I was at Yodobashi Camera yesterday, I got a Thunderbolt to Gigabit ethernet adapter for my MacBook Pro. I figure, since I'm paying for the high speed fiber optic (Sony Nuro), why limit my self to wi-fi speeds at home?
Before connecting the adapter, via wi-fi it the speed was 143.8 Mbps down and 181.5 Mbps up.
After connecting the adapter and making a direct LAN connection to the router, the speed is 783.2 Mbps down and 940.1 Mbps up.
I'm certainly happy with the speed, but since Sony Nuro is supposed to be 2 Gbps down and 1 Gbps up I was wondering what the maximum possible is with this computer and adapter. Before asking the provider I was curious what the maximum specs where.
The ether cable is a 3 m category 6.
Thanks,
doug

It's not really your computer that is getting the 2Gbps download - it is the router/ modem.
If you hooked better/ different hardware up you could probably push those speeds around your network too. The trouble is that most residential hardware is gigabit ethernet not fibre. Fibre cards & cable are expensive in comparison.
The existing hardware may allow you to 'bond or aggregate' multiple ethernet connections into one link to get more speed over ethernet. Obviously this requires more complex routers, switches & a network admin to set it up
Those speeds sound nice, this bottleneck will mean that other devices on you network can't choke up the whole connection & make other users sad.

Airport extreme (gigabit ethernet) b/g not working

I have an airport extreme (gigabit ethernet) that I use as my base in an extended network. I Have always had it in Wireless N mode with b/g compatability. the other day my speeds went from being super fast and happy to less than 1mbps. I went and plugged directly in to the airport via ethernet and got blazing fast speeds again.. I switched my radio mode to n only and wireless speeds were fast again.. switched back to b/g compatible and they are in the toilet.. is it possible for the b/g compatible antenna to just crap out? if so this is very disoncerting as I have several wireless devices in my home that operate on b/g and don't want them to be left out in the cold.
Any input is greatly appreciated.

what I did with the b/g testing was I changed the name of the base station to another name so none of the b/g devices that were connecting to it could.. and so it was only the laptop I was using to run the tests.. and still the speeds were terrible.. of course then when I changed it to "n" only mode they were fast again. so I know that my laptop was the only client connected wirelessly or otherwise to the base station when running both tests.
I am extending the network with an airport extreme base station dual band. The solution I have in place currently is to basically swap them. I Have the Dual band running as the main base station in N mode with b/g compatability, and I have the Gigabit ethernet AEBS running as the extender... so far my speeds haven't suffered at all and hopefully it will hold that way. but I still can't understand why the AEBSn would suddenly just stop providing any kind of speed when running as the base in b/g compatibility mode.

Dual Channel Gigabit Ethernet on MBP!?

Similar Messages

Maybe you are looking for